I am having some trouble trying to merge two JSON objects retrieved from my SQL Server database into a single object in Node-Red.
The flow I have created is the following:
For each call to the database I am receiving the following objects:
Plans:
[{"PlanID":2,"Status":0,"EndTime":"0001-01-01T00:00:00.000Z"}]
Goals:
[{"GoalID":1,"PlanID":2, "Type":2,"Message":"Walk 1000 km","Difficulty":0}]
I have created two functions which assign these objects into flow variables ('plans' and 'goals'), and now I was trying to merge both objects into a single JSON object.
I don't know if I have to use the Join node for this purpose and if so how to configure it, but my idea was to create a JSON object in this format:
[{"GoalID":1,"Plan":{"PlanID":2,"Status":0,"EndTime":"0001-01-01T00:00:00.000Z"}, "Type":2,"Message":"Walk 1000 km","Difficulty":0}]
First I wouldn't set them as flow variables as these will get over written if you get a second request in to the http-in node while the Database look ups are happening. Better to add them as msg variables then they flow with the msg and can't be overwritten.
Given you are not just combining the 2 objects to get the super set of keys and values you are probably best off just using either a function node or the change to assemble to the output object yourself.
Assuming the input looks something like:
msg.plans = [{"PlanID":2,"Status":0,"EndTime":"0001-01-01T00:00:00.000Z"}]
msg.goals = [{"GoalID":1,"PlanID":2, "Type":2,"Message":"Walk 1000 km","Difficulty":0}]
then the function node would look something like:
msg.payload = msg.goals[0];
msg.payload.plan = msg.plans[0];
delete msg.goals;
delete msg.plans;
return msg;
The change node rules would looks something like
The join node would work to get the 2 objects into an array or an object using the topics as keys to hold the 2 input messages.
Related
In Angular:
I'm trying to delete items from a local json server using a http request.
The problem is that the items don't have 'real' id's. Their id's are strings which json doesn't recognises as id's (so far I know).
So when I try to search for an id (either to get it or delete it) I have to use for example:
"http://localhost:3000/watchlist?imdbID=tt5745872"
which gives an array with 1 item.
When using this in a delete request, it will result in a 404.
I was wondering if there is some kind of a workaround for doing this or do I really have to implement 'real' id's?
Context: I'm getting movies from an API and I then store those in an json server. As the API uses string id's, it would be a pain in the ass to try and implement a second id for the same object.
Can I populate a list with JSON data? I have a general list containing data available for several sessions but I need to filter them with my current session and insert them to another list. My idea is to use the filtered JSON data since I successfully filtered them in JSON format. I've looked into some threads that might relate but currently get nothing. Hope someone can point me to the right page.
I missed this page: or maybe I overlooked it: https://forum.alphasoftware.com/showthread.php?119524-How-to-populate-a-List-from-a-JSON-formatted-field.
Anyway, populating JSON data into list in alpha anywhere is easy to be done. Firstly, get the JSON data(in my case I produce them from another list). With this data(already in JSON format), I do the filter using:
var filtered_json = find_in_object(JSON.parse('my_JSON_data'), {my_filter_condition});
Then, the result should be in [object object][object object]
Finally, populate the result to the list.
var lObj= {dialog.object}.getControl('my_list_ID')
lObj.populate(filtered_json);
How do you query MongoDB using mongoose with node.js? I have it to where I can insert my JSON object to my DB, but all the ways I have tried to return the JSON object from the DB return null or just information about the database.
Is there some good method using mongoose to be able to query the database similar to the method:
var cursor = db.collection.find()
var JSONobject = cursor.next()
Here's what is in my code right now:
mongoose.connect('mongodb://localhost/myDB');
mongoose.connection.on('error', console.error.bind(console, 'connection error:'));
var cursor = mongoose.connection.db.contents.find();
console.log(cursor.next());
This throws an error at the line :
var cursor = mongoose....
claiming 'cannot call method 'find' of undefined'.
Note, that my collection 'contents' does in fact exist, and it contains one JSON document. I know this because I manually navigated to the collection using the mongo shell.
Edit: I am open to alternative methods to querying the database. I simply just want to be able to return JSON objects from my DB one at a time, while keeping track of where the client is at in the database.
One method to query mongoDB using mongoose is as follows:
Content.findOne().exec(function(err,docs){console.log(docs)});
Docs contains the JSON object. Access its attributes like any other object.
Note, this method uses asynchronous call backs. As such, you can't store the JSON object docs to a variable in order to use the JSON document information outside of the function. Therefore, you need to perform whatever actions needed with the JSON docs object information inside of the function.
For example, I was needing the query information to provide the filepath for my get api. As such, the result was as follows:
//get
app.get('/api/media/', function(req,res){
Content.findOne().exec(function(err,docs){res.sendFile(path.join(__dirname, '/api/media/', docs.filename))});
});
Note, Content is the model of my schema, and one of its parameters is filename.
I am attempting to use sortcomparefunction to ensure a specific data entry is the last object of its parent. However when using the sortcomparefunction the objects being passed in are always the root object. is there another way i could sort my data to ensure the object named "Upload" is always at the bottom. Just to clarify im trying to sort the data held in objects 1 2 and 3 fo4r example. My data is structured as below
`rootObject -Object1-namedObject1
namedObject2
Upload
Object2- stackObject
Upload
errorprofile
Object3-images
Upload
Video`
I'm working on a C# program that retrieves data from a ServiceNow database and converts that data into C# .NET objects. I'm using the JSON Web Service to return my data in JSON format.
What I want to achieve is as follows: If there is a relational mapping between a value (for
example: I have a table called Company, where CEO is not a TEXT field but an sys_id to a Employee Table) I want to be able to output that data not with an sys_id (or just displaying the name property by using the 'displayvariable' parameter) but by an object displayed in JSON.
This means that the value of a property should be an object in JSON instead of just a single value.
A few examples:
// I don't want the JSON like this
{"Company":{"CEO":"b181e841c9212c008aeb36850331fab2"}}
// Or by displaying the name of the sys_id table
{"Company":{"CEO":"James Henderson" }}
// I want the data as follows, so I can have all the data I need inside a single JSON record.
{"Company":{"CEO":{"name":"James Henderson", "age":34, "sex":"male", "office":"SBN Left Floor 23"}}}
From reading the documentation I couldn't find anything in the JSON Web Service that allowed me to display the information like this nor
find any other alternative. It should have something to do with joining the tables and displaying it all in the right format.
I have been using SNC for almost three years and have not found you can automatically join tables in a web service. Your best option would be to use a scripted web service which possibly takes a query parameter and table parameter. Then you can json serialized your result as you see fit.
Or, another option would be to generate a new processor that will traverse the GlideRecord object. The ?JSON parameter you pass in to the URL is merely a flag to pass your request to a particular processor. Unfortunately the OOB one I believe is a Java class not a JS script, so you would need to write a script much like I mentioned earlier to traverse the object path serializing the object graph as far down as your want to go.